Question Detail

The electric force (F) experienced by a charged particle (q) in an electric field (E) is given by the formula F = qE.I. The force is directly proportional to the charge (q) on the body. So, statement I is true.II. The force is directly proportional to the strength of the electric field (E). So, statement II is true.III. The 'distance between the body and a test charge' is generally a factor in determining the electric field strength (E) if the field is produced by another point charge. However, the question asks what the force 'depends on' once the particle is in the field. The direct factors are its charge and the field strength at its location. If the field is already specified by E, then distance to a hypothetical 'test charge' is not an independent factor for the force on the particle itself.Therefore, the force directly depends on the charge of the particle and the strength of the electric field it is in. So, only I and II are correct.